Abstract

A design for an all-optical crossbar network utilizing
wavelength-tunable vertical-cavity surface-emitting laser (VCSEL)
technology and a combination of free-space optics and compact optical
waveguides is presented. Polymer waveguides route the optical
signals from a spatially distributed array of processors to a central
free-space optical crossbar, producing a passive, all-optical, fully
connected crossbar network directly from processor to
processor. The analyzed network could, relatively inexpensively,
connect local clusters of tightly integrated processors. In
addition, it is also believed that such a network could be extended,
with wavelength reuse, to connect much larger numbers of processors in
a multicluster network.

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